Given a text, write a compressed version of it in a single sentence.

Improved benefit event : Mary Tyler Moore, Diane Sawyer, Katie Couric, and Liz Smith swim laps in a big tank of lobsters.
Mary Tyler Moore, Diane Sawyer, Katie Couric,and Liz Smith swimming laps in a lobster tank.

There are two major types of sewing machines used in garment assembly: the lockstitch and the chain-stitch machine. Each type feeds in separate threads above and below the fabric, and these two threads must be connected in some fashion to form a stitch.
The two major types of sewing machines used in garment assembly are the lockstitch and the chain-stitch. Each feed threads above and below the fabric. These threads connect to form a stitch.

Contributions may be made when the pledge is submitted or anytime prior to the end of 1991. A pledge card and return envelope are enclosed.

Gifts may be made when submitting pledge card (and return envelope) enclosed or before the end of 1991.

